Use path alias as contextual filter

Question

I have nodes in Drupal for News Articles that generates this automatic URL alias.

I also have a view for News nodes.

This is the data.

The problem is that I can't use Content: Path (url) or Content: Path (Path) as contextual filter.

sync/newslist/1234, where 1234 is node ID, works. I would like to pass the path or the URL to the contextual filter, so that sync/newslist/world-first-chart-alerts-non-artists will return that node.

Answer 1

You can for example create a custom ViewsArgumentValidator and transform the given alias to the Node ID.

<?php

namespace Drupal\my_module\Plugin\views\argument_validator;

use Drupal\path_alias\AliasManagerInterface;
use Drupal\views\Plugin\views\argument_validator\ArgumentValidatorPluginBase;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Validates whether an alias is a valid node alias and transform it to the nid.
 *
 * @ViewsArgumentValidator(
 *   id = "node_alias",
 *   title = @Translation("Node ID by alias")
 * )
 */
class NodeAlias extends ArgumentValidatorPluginBase {

  /**
   * The alias manager.
   *
   * @var \Drupal\path_alias\AliasManagerInterface
   */
  protected $aliasManager;

  /**
   * {@inheritdoc}
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, AliasManagerInterface $alias_manager) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->aliasManager = $alias_manager;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('path_alias.manager'),
    );
  }

  /**
   * {@inheritdoc}
   */
  public function validateArgument($argument) {
    // Prepend slash.
    $argument = '/' . ltrim($argument, '/');
    $path = $this->aliasManager->getPathByAlias($argument);

    if (preg_match('/node\/(\d+)/', $path, $matches)) {
      $this->argument->argument = $matches[1];
      return TRUE;
    }
    return FALSE;
  }

}

In the validateArgument function we are checking if an internal path for a node can be found with that alias and transform the given argument to the corresponding Node ID.

Add this file named NodeAlias.php to you custom module in src/Plugin/views/argument_validator directory and clear the cache.

After that, you can use the Content: Nid contextual filter and select in the "When the filter value is in the URL or a default is provided" section the new Validator Node ID by alias.